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Université de Fribourg

Neogene amphibians and reptiles (Caudata, Anura, Gekkota, Lacertilia, and Testudines) from the south of Western Siberia, Russia, and Northeastern Kazakhstan

Vasilyan​, Davit ; Zazhigin, Vladimir S. ; Böhme, Madelaine

In: PeerJ, 2017, vol. 5, p. e3025

The present-day amphibian and reptile fauna of Western Siberia are the least diverse of the Palaearctic Realm, as a consequence of the unfavourable climatic conditions that predominate in this region. The origin and emergence of these herpetofaunal groups are poorly understood. Aside from the better-explored European Neogene localities yielding amphibian and reptile fossil remains, the...

Université de Fribourg

Osteology, fossil record and palaeodiversity of the European lizards

Villa, Andrea ; Tschopp, Emanuel ; Georgalis, Georgios L. ; Delfino, Massimo

In: Amphibia-Reptilia, 2017, vol. 38, no. 1, p. 79–88

he capability of palaeontologists to identify fossil remains of a particular group of vertebrates strongly depends on the knowledge they have of its comparative osteology and on the actual presence of diagnostic differences among the considered taxa. This could have a relevant influence on the study of palaeodiversity, since a low recognisability causes a loss of data when trying to...

Université de Fribourg

A microfluidics-based method for measuring neuronal activity in Drosophila chemosensory neurons

Giesen, Lena van ; Neagu-Maier, G. Larisa ; Kwon, Jae Young ; Sprecher, Simon G.

In: Nature Protocols, 2016, vol. 11, no. 12, p. 2389–2400

Monitoring neuronal responses to defined sensory stimuli is a powerful and widely used approach for understanding sensory coding in the nervous system. However, providing precise, stereotypic and reproducible cues while concomitantly recording neuronal activity remains technically challenging. Here we describe the fabrication and use of a microfluidics system that allows precise temporally...

Università della Svizzera italiana

Symbiotic interaction between humans and robot swarms

Nagi, Jawad ; Gambardella, Luca Maria (Dir.) ; Di Caro, Gianni (Codir.)

Thèse de doctorat : Università della Svizzera italiana, 2016 ; 2016INFO003.

Comprising of a potentially large team of autonomous cooperative robots locally interacting and communicating with each other, robot swarms provide a natural diversity of parallel and distributed functionalities, high flexibility, potential for redundancy, and fault-tolerance. The use of autonomous mobile robots is expected to increase in the future and swarm robotic systems are envisioned to...

Université de Fribourg

Super resolution imaging of genetically labeled synapses in drosophila brain tissue

Spühler, Isabelle A. ; Conley, Gaurasundar M. ; Scheffold, Frank ; Sprecher, Simon G.

In: Frontiers in Cellular Neuroscience, 2016, p. 142

Understanding synaptic connectivity and plasticity within brain circuits and their relationship to learning and behavior is a fundamental quest in neuroscience. Visualizing the fine details of synapses using optical microscopy remains however a major technical challenge. Super resolution microscopy opens the possibility to reveal molecular features of synapses beyond the diffraction limit....

Université de Fribourg

First description of a fossil chamaeleonid from Greece and its relevance for the European biogeographic history of the group

Georgalis, Georgios L. ; Villa, Andrea ; Delfino, Massimo

In: The Science of Nature, 2016, vol. 103, no. 1–2, p. 1–12

The fossil record of Chamaeleonidae is very scarce and any new specimen is therefore considered important for our understanding of the evolutionary and biogeographic history of the group. New specimens from the early Miocene of Aliveri (Evia Island), Greece constitute the only fossils of these lizards from southeastern Europe. Skull roofing material is tentatively attributed to the Czech species...

Université de Fribourg

The microcephaly-associated protein Wdr62/CG7337 is required to maintain centrosome asymmetry in Drosophila neuroblasts

Nair, Anjana Ramdas ; Singh, Priyanka ; Garcia, David Salvador ; Rodriguez-Crespo, David ; Egger, Boris ; Cabernard, Clemens

In: Cell Reports, 2016, vol. 14, no. 5, p. 1100–1113

Centrosome asymmetry has been implicated in stem cell fate maintenance in both flies and vertebrates, but the underlying molecular mechanisms are incompletely understood. Here, we report that loss of CG7337, the fly ortholog of WDR62, compromises interphase centrosome asymmetry in fly neural stem cells (neuroblasts). Wdr62 maintains an active interphase microtubule-organizing center (MTOC) by...

Université de Fribourg

Potency of transgenic effectors for neurogenetic manipulation in Drosophila larvae

Pauls, Dennis ; Essen, Alina von ; Lyutova, Radostina ; Giesen, Lena van ; Rosner, Ronny ; Wegener, Christian ; Sprecher, Simon G.

In: Genetics, 2014, vol. 199, no. 1, p. 25–37

Genetic manipulations of neuronal activity are a cornerstone of studies aimed to identify the functional impact of defined neurons for animal behavior. With its small nervous system, rapid life cycle, and genetic amenability, the fruit fly Drosophila melanogaster provides an attractive model system to study neuronal circuit function. In the past two decades, a large repertoire of elegant genetic...

Bibliothèque cantonale jurassienne

Biomechanical investigations on the skulls of reptiles and mammals

Preuschoft, Holger ; Witzel, Ulrich

In: Senckenbergiana lethaea : wissenschaftliche Mitteilungen der Senckenbergischen Naturforschenden Gesellschaft, 2002, vol. 82, no. 1, p. 207-222